MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

DiscoveryServer directory

Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

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2909 servers

Ordered by checks passedClear filters
Dated server measurements. The status describes the last probe or a listed authentication requirement. Checks that have not been measured are not failures. Open a server to inspect the evidence.
Server / capabilityLast probeMedian latencyChecks passedLast checked
b612 (hakuto AI)

Design-review copilot: industry design checkpoints, edge cases, and Japanese legal notes.

LegalAI / LLM tooling

Responded559 ms13 / 22
Mash Prime

Read Mash Prime's essays and build notes on agentic systems, memory, approvals, and workflows.

ProductivityAutomation & workflows

Outdated check560 ms13 / 22
x402 Web Tools

Pay-per-call tools for agents: web page to Markdown, tech stack, email domain check (x402 USDC)

Finance & CryptoPayments & trading

Outdated check565 ms13 / 22
Code Interpreter Agent by Nova (CIVAI)

I do everything related to coding and execution tasks

Developer ToolsCode & DevOps

Responded572 ms13 / 22
Calendar Agent by Nova (CIVAI)

I do everything related to calendar scheduling

ProductivityFile & docs

Responded586 ms13 / 22
Alder Invoices

Free invoice drafts, templates and direct PDF generation for AI agents. No account needed.

Finance & CryptoPayments & trading

Responded594 ms13 / 22
Sigil

Brand reviews from a public website and an optional product document.

OtherFile & docs

Responded595 ms13 / 22
Genko Prior Auth public docs

Read-only Genko Prior Auth docs, guides, specialty checklists, facts, pricing and fit checks.

OtherOther

Responded596 ms13 / 22
SMSPVA Documentation

SMSPVA API docs: search and code examples for SMS activation, number rental and private email.

ProductivityCommunication & messaging

Responded604 ms13 / 22
com.abundanceapis/abundance-apis

Try 26 utility REST APIs keylessly: NAICS classification, IP geo, email validation, currency.

Finance & CryptoCommunication & messaging

Responded604 ms13 / 22
io.github.devlollc/torneo

Observatory operated and funded by devlo: real tools on frozen tasks; intervals, cost, limits.

Developer ToolsCode & DevOps

Responded604 ms13 / 22
Curated

Keep and share lists of recommendations with your own notes, and read lists from people you trust.

ProductivityFile & docs

Outdated check605 ms13 / 22
PDF Agent by Nova (CIVAI)

I create PDF documents from markdown, preview, then generate a downloadable file

Developer ToolsFile & docs

Responded613 ms13 / 22
YouTube Email Finder

Find the contact email of YouTube channels from the link, the @handle or the channel_id. Resolves th

MediaCommunication & messaging

Outdated check618 ms13 / 22
Multilo

Search Multilo's docs, fetch any public page as clean Markdown, and read the changelog.

OtherFile & docs

Responded619 ms13 / 22
WarmInboxes Free MCP: Fleet Planner

Read-only sizing and pricing for cold email inboxes: how many, which provider, what it costs.

ProductivityCommunication & messaging

Outdated check622 ms13 / 22
99 Data Rooms

Read-only facts about 99 Data Rooms, a UK virtual data room: docs, glossary, pricing, use cases.

Developer ToolsCode & DevOps

Responded629 ms13 / 22
ZapSign

ZapSign electronic document signing via the official API: create documents for signature (from PDF,

Developer ToolsFile & docs

Outdated check629 ms13 / 22
co.vincap/listed-wine-companies

Listed wine-company index, results, calendar and estates; dated, sourced. Not investment advice.

ProductivityFile & docs

Responded632 ms13 / 22
Spur

Real estate leads, skip tracing, direct mail, SMS & email outreach, and marketing automations

Real Estate & PropertyCommunication & messaging

Outdated check636 ms13 / 22
doc-convert-mcp

Document conversion and OCR for AI agents: PDF, Office docs, images to text.

MediaFile & docs

Outdated check650 ms13 / 22
Subpay Invoice Reader

Reads invoices and receipts from PDF to JSON and checks the math. $0.04/page via x402.

Finance & CryptoPayments & trading

Responded654 ms13 / 22
io.github.Melusi-M/fixmypdf

Privacy-first PDF tools over MCP: merge, split, rotate, delete, compress, protect, inspect.

Developer ToolsCode & DevOps

Outdated check662 ms13 / 22
DivestMe — Zombie Asset Sale Documentation

Document a §1001 sale of dead startup stock, SAFEs, notes, or LLC interests — capital loss records

Finance & CryptoFile & docs

Outdated check673 ms13 / 22

Automated measurements. Not a rating. Unmeasured checks are not failures. How to read the evidence